虽然第一个答案应该是“使用Storyboard Segues”，但是您可以通过以下方式解决自定义转换：

通用方法

1. 修改您CustomSegue采用两个 UIStoryboardSegue 和 UIViewControllerAnimatedTransitioning协议。
2. 重构，CustomSegue以便两种协议都可以使用动画。
3. delegate在导航控制器上设置a ，导航控制器可以是其本身，以提供对push＆的自定义转换pop
4. 让我们animationControllerForOperation创建并返回一个CustomSegue带有您选择的标识符的实例。

概述

// Adopt both protocols
class CustomSegue: UIStoryboardSegue, UIViewControllerAnimatedTransitioning {

    func animate(firstVCView:UIView,
        secondVCView:UIView,
        containerView:UIView,
        transitionContext: UIViewControllerContextTransitioning?) {
            // factored transition code goes here
                }) { (Finished) -> Void in
                    if let context = transitionContext {
                        // UIViewControllerAnimatedTransitioning
                    } else {
                        // UIStoryboardSegue
                    }
            }
    }

    func transitionDuration(transitionContext: UIViewControllerContextTransitioning) -> NSTimeInterval {
        // return timing
    }

    func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
        // Perform animate using transitionContext information
        // (UIViewControllerAnimatedTransitioning)
    }

    override func perform() {
        // Perform animate using segue (self) variables
        // (UIStoryboardSegue) 
    }
}

下面是完整的代码示例。已经过测试。请注意，我还修复了原始问题中的一些动画错误，并添加了淡入效果以强调动画。

CustomSegue类

// Animation for both a Segue and a Transition
class CustomSegue: UIStoryboardSegue, UIViewControllerAnimatedTransitioning {

    func animate(firstVCView:UIView,
        secondVCView:UIView,
        containerView:UIView,
        transitionContext: UIViewControllerContextTransitioning?) {

            // Get the screen width and height.
            let offset = secondVCView.bounds.width

            // Specify the initial position of the destination view.
            secondVCView.frame = CGRectOffset(secondVCView.frame, offset, 0.0)

            firstVCView.superview!.addSubview(secondVCView)
            secondVCView.alpha = 0;

            // Animate the transition.
            UIView.animateWithDuration(self.transitionDuration(transitionContext!),
                animations: { () -> Void in
                    firstVCView.frame = CGRectOffset(firstVCView.frame, -offset, 0.0)
                    secondVCView.frame = CGRectOffset(secondVCView.frame, -offset, 0.0)
                    secondVCView.alpha = 1; // emphasis

                }) { (Finished) -> Void in
                    if let context = transitionContext {
                        context.completeTransition(!context.transitionWasCancelled())
                    } else {
                        self.sourceViewController.presentViewController(
                            self.destinationViewController as! UIViewController,
                            animated: false,
                            completion:nil)
                    }
            }
    }

    func transitionDuration(transitionContext: UIViewControllerContextTransitioning) -> NSTimeInterval {
        return 4 // four seconds
    }

    // Perform Transition (UIViewControllerAnimatedTransitioning)
    func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
        self.animate(transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)!.view,
            secondVCView: transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)!.view,
            containerView: transitionContext.containerView(),
            transitionContext: transitionContext)
    }

    // Perform Segue (UIStoryboardSegue)
    override func perform() {
        self.animate(self.sourceViewController.view!!,
            secondVCView: self.destinationViewController.view!!,
            containerView: self.sourceViewController.view!!.superview!,
            transitionContext:nil)
    }
}

主机ViewController类

class ViewController: UIViewController, UINavigationControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationController?.delegate = self
    }

    func navigationController(navigationController: UINavigationController, animationControllerForOperation operation: UINavigationControllerOperation, fromViewController fromVC: UIViewController, toViewController toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        switch operation {
        case .Push:
             return CustomSegue(identifier: "Abc", source: fromVC, destination: toVC)

        default:
            return nil
        }
    }
}